基于三维逆向建模的轿车前副车架有限元与实验模态分析.PDFVIP

制造业信息化 MANUFACTURING INFORMATIZATION 仿真 建模 / /CAD/CAM/CAE/CAPP 基于三维逆向建模的轿车前副车架有限元与实验模态分析 孙传阳，李剑敏，杨章程，陈道攀 （浙江理工大学机械与自动控制学院浙江省可靠性重点实验室，杭州310018） 摘 要：以某大众轿车副车架为对象，通过逆向工程反求得到三维模型，进行了模态试验和有限元分析。分析结果表明：对 于复杂机械构件通过三维逆向反求能够得到较好的工程模型；文中研究的大众副车架固有频率较高，能够有效地避免路 面激励通过悬架传入形成共振，具有较好的动力学特性；分析指出了副车架局部刚度较弱的部位，在设计中需引起关注。 关键词 副车架；逆向工程；模态实验；固有频率 ： 中图分类号：U463.32.04 文献标识码：A 文章编号：1002－2333 （2012）11－0054－04 Finite Element and Test Modal Analysis of Car Sub-frame Based on 3D Reverse Modeling SUN Chuan-yang, LI Jian-min, YANG Zhang-cheng, CHEN Dao-pan （College of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Reliability Key Laboratory of Zhejiang Province, Hangzhou 310018, China ） Abstract ： Taking the Volkswagen car sub-frame as object, the 3D model is obtained through reverse engineering, then 库 a modal test and finite element analysis are carried out. The analysis results show that: better engineering model of the complex mechanical components can be realized through three-dimensional reverse engineering. The Volkswagen car 例 sub-frame has high natural frequency which can effectively avoid the road excitation through the suspension afferents ’ form resonance, and has better dynamic characteristics. The analysis pointed out the weak area of the sub -frame s local stiffness, that should be paid attention in the design.案 Key words ： sub-frame; reverse engineering; modal test; natural frequency. E A 1 引 言 C 承受来自路面的随机载荷和发动机的振动载